you found yourself walking around Snowdin late at night (about 11:30 pm) it was cold and snowing, but you didn't care. Until Papyrus peeked out the window to watch the snow fall, and that's when he saw you, your clothes wet from the icy snow and cold.

"Ah! Don't worry human!"

Papyrus immediately came out of his house to then carry you in his arms to get you into his house.

"Human, you mustn't do that! You might get sick!"

*Papyrus lent you his clothes, they were a bit big on you but you liked them, you felt warm and cozy. And Papyrus also liked to see you with his clothes on. So the two of you ended up having an accidental sleepover. And just now, they were watching a movie, snuggling and sometimes taking pictures together.